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Posts Tagged ‘Severe Tropical Cyclone IAN’

Cyclone IAN Leaves Thousands of Tongans Homeless

Posted by feww on January 14, 2014

EXTREME CLIMATIC EVENTS
.

IAN destroys 75 percent of houses in Pangai, capital of the Haʻapai Group, Tonga

The category 5 tropical cyclone killed at least one person, injuring many leaving thousands of people homeless, as it swept through the Tongan Islands with sustained winds of more than 200 km/h over the weekend.

“The worst affected area was the northern part of the Ha’apai group of islands, with damage to buildings and services such as water, telecommunications and power, said a report.

Cyclone IAN aftermath in Tonga
IAN carves a wide path of destruction on Foa island in Tonga’s Ha’apai group. Image credit: @ProudTongans.

“It was so strong, all the houses gone and it actually lifted cars, lifted cars and moved buses,” said an eye-witness.

On Saturday, IAN  slammed into the northern Tongan islands with sustained winds of 300 km/h destroying or damaging 70% of homes, according to emergency officials.

There are reports of extensive damage also to most of the smaller islands, said officials.

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IAN Causes Widespread Destruction on Tonga Islands

Posted by feww on January 12, 2014

EXTREME CLIMATIC EVENT
.

Super Cyclone IAN destroys or damages 70% of homes in Tonga’s northern islands: Emergency Officials

The massive cyclone, probably the worst to hit Tonga in recorded history, slammed into the northern islands on Saturday on its way to the main island.

ian BDIR 12jan14
Severe Tropical Cyclone IAN.  IR [BD Enhancement] Satellite Image. Recorded at 02:52UTC on Sunday, January 12, 2014.  Source: CIMSS/SSEC/WISC.

Tonga’s director of emergencies has expressed grave concerns for the islands in the Ha’apai island group where communications have been cut, said ABC Australia.

The full extent of damage from the cyclone is not yet known because there is no communication with much of the Ha’apai group of islands, ABC Australia quoted him as saying.

“The picture comes to hand now, it was really bad,” he said.

“I think it was 70 per cent of the housing of the two islands that we have access to now have been affected – destroyed or partially damaged.

“We have got some people sheltered in some of the evacuation centres, buildings and some of the churches.”

The island of Lifuka is reportedly the worst hit area.

IAN has since weakened to a Cat 3 cyclone, moving away from Tonga and out into the ocean.

Aus Cyclone scale -s
Australian Tropical Cyclone Intensity Scale. Copyright: FIRE-EARTH Blog.

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Super Cyclone IAN Targeting Ha’apai islands, Tonga

Posted by feww on January 11, 2014

EXTREME CLIMATIC EVENT

IAN the most powerful cyclone to hit northern islands of Tonga

Tonga has declared a state of emergency for the northern islands, after the authorities reported extensive damage to homes on Hunga.

IAN is forecast to track east of Tonga’s capital, Nuku’alofa, but could still cause large scale destruction to property and infrastructure.

FIRE-EARTH Models showed IAN had intensified to a super cyclone with sustained winds of about 235 km/h gusting to over 280 km/h at 04:20UTC on January 11, 2014.

IAN 11jan14
Super Cyclone IAN.  Water Vapor [FIRE-EARTH Enhancement] Satellite Image. Recorded at 03:52UTC on Saturday, January 11, 2014.  Initial Image Sourced from: CIMSS/SSEC/WISC.

The FIJI Met Office has just issued the following Warning:

Special Weather Bulletin Number TWENTY EIGHT for Tonga
ON SEVERE TROPICAL CYCLONE IAN –
ISSUED FROM RSMC NADI (FIJI) – Jan 11, 2014  at 04:20UTC

TROPICAL CYCLONE WARNING.

A HURRICANE WARNING REMAINS IN FORCE FOR THE HA’APAI GROUP.
A GALE WARNING REMAINS IN FORCE FOR THE TONGATAPU GROUP BUT IS NOW
CANCELED FOR VAVAU GROUP.

A STRONG WIND WARNING REMAINS IN FORCE FOR THE REST OF TONGA.

SEVERE TROPICAL CYCLONE IAN CENTRE [935HPA] CAT 5 WAS LOCATED NEAR 19
DECIMAL 5 SOUTH 174 DECIMAL 2 WEST OR ABOUT 55 NAUTICAL MILES
SOUTH-SOUTHWEST OF VAVA’U AND 10 NAUTICAL MILES SOUTHEAST OF HA’APAI
AT [11 Jan 03:00UTC ]  IAN IS CURRENTLY MOVING TOWARDS THE SOUTH-SOUTHEAST AT
ABOUT 08 KNOTS. CLOSE TO ITS CENTRE, THE CYCLONE IS ESTIMATED TO HAVE
AVERAGE WINDS UP TO ABOUT 110 KNOTS WITH MOMENTARY GUSTS TO 155
KNOTS.

ON THIS FORECAST TRACK, THE CYCLONE IS EXPECTED TO BE LOCATED ABOUT
95 NAUTICAL MILES SOUTH-SOUTHEAST OF HA’APAI OR ABOUT 85 NAUTICAL
MILES EAST OF NUKUALOFA AT [11 Jan at 15:00UTC] AND ABOUT 140 NAUTICAL MILES
SOUTHEAST OF NUKUALOFA OR ABOUT 185 NAUTICAL MILES SOUTH-SOUTHEAST OF
HA’APAI AT [12 Jan 03:00UTC]

DESTRUCTIVE WINDS MAY BEGIN SEVERAL HOURS BEFORE THE CYCLONE CENTRE
PASSES OVERHEAD OR NEARBY.

FOR THE HA’APAI GROUP:
EXPECT VERY DESTRUCTIVE HURRICANE FORCE WINDS WITH AVERAGE SPEED OF
110 KNOTS AND MOMENTARY GUSTS TO 155 KNOTS. WINDS EXPECTED TO EASE TO
AVERAGE SPEED OF 65 KNOTS WITHIN THE NEXT 6 HOURS. HEAVY RAIN AND
SQUALLY THUNDERSTORMS. FLOODING INCLUDING SEA FLOODING OF LOW LYING
COASTAL AREAS. PHENOMENAL SEAS. DAMAGING HEAVY SWELLS.

FOR THE TONGATAPU GROUP:
EXPECT DAMAGING GALE FORCE WINDS WITH AVERAGE SPEED OF 40 KNOTS AND
MOMENTARY GUSTS TO 55 KNOTS. RAIN, HEAVY AT TIMES AND SQUALLY
THUNDERSTORMS. FLOODING INCLUDING SEA FLOODING OF LOW LYING COASTAL
AREAS. HIGH SEAS. DAMAGING HEAVY SWELLS.

FOR THE REST OF TONGA:
CLOCKWISE WINDS 20 TO 25 KNOTS, GUSTING TO 40 KNOTS. OCCASIONAL RAIN
AND SQUALLY THUNDERSTORMS. ROUGH TO VERY ROUGH SEAS. MODERATE TO
HEAVY SWELLS.

Tropical Cyclone Scales

Aus Cyclone scale -s
Australian Tropical Cyclone Intensity Scale. Copyright: FIRE-EARTH Blog.

Southwest Indian Ocean
Very Intense Tropical Cyclone: sustained winds  >115 kt  (>212 km/h)
Intense Tropical Cyclone: sustained winds of 90–115 kt (166–212 km/h)
Tropical Cyclone:  sustained winds of 64–89 kt (118–165 km/h)
Severe Tropical Storm: winds of 48–63 kt (89–117 km/h)
Moderate Tropical Storm:  winds of 34–47 kt (63–88 km/h)
Tropical Depression: wind of 28–33 kt (51–62 km/h)
Tropical Disturbance: winds <28 kt ( <50 km/h).

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IAN Threatens Tonga with Cat 4 Hurricane Winds

Posted by feww on January 10, 2014

Severe Tropical Cyclone IAN moving toward Vava’u island chain, Tonga

Severe Tropical Cyclone IAN (Tropical Cyclone 07P) was packing sustained winds of about 175 km/h at 02:00UTC on Friday, January 10, 2014, with wind gusts of about 215 km/h moving ESE at about 10 km/h.

IAN could strike Vava’u with destructive winds by as early as 03:00UTC on Saturday, January 11.

IAN-WV
Severe Tropical Cyclone  IAN. Water Vapor [FIRE-EARTH Enhancement] Satellite Image. Recorded at 01:52UTC on Friday, January 10, 2014.  Initial Image Sourced from: CIMSS/SSEC/WISC.

Severe Tropical Cyclone IAN
Time: 02:00UTC Friday January 10, 2014
Position: Near 17.5ºS, 175.3ºW
Location: 655km East (84 degrees) of Suva, Fiji
Movement: ESE at 10 km/h
Max Sustained Winds: 175 km/h
Max wind Gusts: 225 km/h
Max Significant Wave Height: 8m
Source: Various Satellites

Note: Category 4 Cyclone has average sustained winds of 159km/h (86 kt) – 198km/h (107kt) and a central pressure of 945-910 hPa.

See also: FEWW New Hurricane Scale

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